475 lines
12 KiB
C
475 lines
12 KiB
C
/*
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em28xx-camera.c - driver for Empia EM25xx/27xx/28xx USB video capture devices
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Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@infradead.org>
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Copyright (C) 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "em28xx.h"
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#include <linux/i2c.h>
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#include <linux/usb.h>
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#include <media/soc_camera.h>
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#include <media/i2c/mt9v011.h>
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#include <media/v4l2-clk.h>
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#include <media/v4l2-common.h>
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/* Possible i2c addresses of Micron sensors */
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static unsigned short micron_sensor_addrs[] = {
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0xb8 >> 1, /* MT9V111, MT9V403 */
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0xba >> 1, /* MT9M001/011/111/112, MT9V011/012/112, MT9D011 */
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0x90 >> 1, /* MT9V012/112, MT9D011 (alternative address) */
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I2C_CLIENT_END
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};
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/* Possible i2c addresses of Omnivision sensors */
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static unsigned short omnivision_sensor_addrs[] = {
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0x42 >> 1, /* OV7725, OV7670/60/48 */
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0x60 >> 1, /* OV2640, OV9650/53/55 */
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I2C_CLIENT_END
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};
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static struct soc_camera_link camlink = {
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.bus_id = 0,
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.flags = 0,
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.module_name = "em28xx",
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.unbalanced_power = true,
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};
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/* FIXME: Should be replaced by a proper mt9m111 driver */
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static int em28xx_initialize_mt9m111(struct em28xx *dev)
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{
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int i;
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unsigned char regs[][3] = {
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{ 0x0d, 0x00, 0x01, }, /* reset and use defaults */
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{ 0x0d, 0x00, 0x00, },
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{ 0x0a, 0x00, 0x21, },
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{ 0x21, 0x04, 0x00, }, /* full readout speed, no row/col skipping */
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};
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for (i = 0; i < ARRAY_SIZE(regs); i++)
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i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
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®s[i][0], 3);
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/* FIXME: This won't be creating a sensor at the media graph */
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return 0;
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}
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/* FIXME: Should be replaced by a proper mt9m001 driver */
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static int em28xx_initialize_mt9m001(struct em28xx *dev)
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{
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int i;
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unsigned char regs[][3] = {
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{ 0x0d, 0x00, 0x01, },
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{ 0x0d, 0x00, 0x00, },
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{ 0x04, 0x05, 0x00, }, /* hres = 1280 */
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{ 0x03, 0x04, 0x00, }, /* vres = 1024 */
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{ 0x20, 0x11, 0x00, },
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{ 0x06, 0x00, 0x10, },
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{ 0x2b, 0x00, 0x24, },
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{ 0x2e, 0x00, 0x24, },
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{ 0x35, 0x00, 0x24, },
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{ 0x2d, 0x00, 0x20, },
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{ 0x2c, 0x00, 0x20, },
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{ 0x09, 0x0a, 0xd4, },
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{ 0x35, 0x00, 0x57, },
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};
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for (i = 0; i < ARRAY_SIZE(regs); i++)
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i2c_master_send(&dev->i2c_client[dev->def_i2c_bus],
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®s[i][0], 3);
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/* FIXME: This won't be creating a sensor at the media graph */
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return 0;
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}
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/*
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* Probes Micron sensors with 8 bit address and 16 bit register width
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*/
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static int em28xx_probe_sensor_micron(struct em28xx *dev)
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{
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int ret, i;
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char *name;
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u8 reg;
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__be16 id_be;
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u16 id;
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struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
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dev->em28xx_sensor = EM28XX_NOSENSOR;
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for (i = 0; micron_sensor_addrs[i] != I2C_CLIENT_END; i++) {
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client.addr = micron_sensor_addrs[i];
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/* NOTE: i2c_smbus_read_word_data() doesn't work with BE data */
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/* Read chip ID from register 0x00 */
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reg = 0x00;
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ret = i2c_master_send(&client, ®, 1);
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if (ret < 0) {
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if (ret != -ENXIO)
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
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if (ret < 0) {
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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id = be16_to_cpu(id_be);
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/* Read chip ID from register 0xff */
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reg = 0xff;
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ret = i2c_master_send(&client, ®, 1);
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if (ret < 0) {
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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ret = i2c_master_recv(&client, (u8 *)&id_be, 2);
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if (ret < 0) {
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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/* Validate chip ID to be sure we have a Micron device */
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if (id != be16_to_cpu(id_be))
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continue;
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/* Check chip ID */
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id = be16_to_cpu(id_be);
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switch (id) {
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case 0x1222:
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name = "MT9V012"; /* MI370 */ /* 640x480 */
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break;
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case 0x1229:
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name = "MT9V112"; /* 640x480 */
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break;
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case 0x1433:
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name = "MT9M011"; /* 1280x1024 */
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break;
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case 0x143a: /* found in the ECS G200 */
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name = "MT9M111"; /* MI1310 */ /* 1280x1024 */
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dev->em28xx_sensor = EM28XX_MT9M111;
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break;
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case 0x148c:
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name = "MT9M112"; /* MI1320 */ /* 1280x1024 */
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break;
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case 0x1511:
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name = "MT9D011"; /* MI2010 */ /* 1600x1200 */
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break;
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case 0x8232:
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case 0x8243: /* rev B */
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name = "MT9V011"; /* MI360 */ /* 640x480 */
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dev->em28xx_sensor = EM28XX_MT9V011;
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break;
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case 0x8431:
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name = "MT9M001"; /* 1280x1024 */
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dev->em28xx_sensor = EM28XX_MT9M001;
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break;
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default:
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dev_info(&dev->intf->dev,
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"unknown Micron sensor detected: 0x%04x\n", id);
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return 0;
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}
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if (dev->em28xx_sensor == EM28XX_NOSENSOR)
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dev_info(&dev->intf->dev,
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"unsupported sensor detected: %s\n", name);
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else
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dev_info(&dev->intf->dev,
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"sensor %s detected\n", name);
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dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
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return 0;
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}
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return -ENODEV;
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}
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/*
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* Probes Omnivision sensors with 8 bit address and register width
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*/
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static int em28xx_probe_sensor_omnivision(struct em28xx *dev)
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{
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int ret, i;
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char *name;
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u8 reg;
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u16 id;
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struct i2c_client client = dev->i2c_client[dev->def_i2c_bus];
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dev->em28xx_sensor = EM28XX_NOSENSOR;
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/* NOTE: these devices have the register auto incrementation disabled
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* by default, so we have to use single byte reads ! */
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for (i = 0; omnivision_sensor_addrs[i] != I2C_CLIENT_END; i++) {
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client.addr = omnivision_sensor_addrs[i];
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/* Read manufacturer ID from registers 0x1c-0x1d (BE) */
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reg = 0x1c;
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ret = i2c_smbus_read_byte_data(&client, reg);
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if (ret < 0) {
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if (ret != -ENXIO)
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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id = ret << 8;
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reg = 0x1d;
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ret = i2c_smbus_read_byte_data(&client, reg);
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if (ret < 0) {
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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id += ret;
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/* Check manufacturer ID */
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if (id != 0x7fa2)
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continue;
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/* Read product ID from registers 0x0a-0x0b (BE) */
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reg = 0x0a;
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ret = i2c_smbus_read_byte_data(&client, reg);
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if (ret < 0) {
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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id = ret << 8;
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reg = 0x0b;
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ret = i2c_smbus_read_byte_data(&client, reg);
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if (ret < 0) {
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dev_err(&dev->intf->dev,
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"couldn't read from i2c device 0x%02x: error %i\n",
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client.addr << 1, ret);
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continue;
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}
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id += ret;
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/* Check product ID */
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switch (id) {
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case 0x2642:
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name = "OV2640";
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dev->em28xx_sensor = EM28XX_OV2640;
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break;
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case 0x7648:
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name = "OV7648";
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break;
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case 0x7660:
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name = "OV7660";
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break;
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case 0x7673:
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name = "OV7670";
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break;
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case 0x7720:
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name = "OV7720";
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break;
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case 0x7721:
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name = "OV7725";
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break;
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case 0x9648: /* Rev 2 */
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case 0x9649: /* Rev 3 */
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name = "OV9640";
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break;
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case 0x9650:
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case 0x9652: /* OV9653 */
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name = "OV9650";
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break;
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case 0x9656: /* Rev 4 */
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case 0x9657: /* Rev 5 */
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name = "OV9655";
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break;
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default:
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dev_info(&dev->intf->dev,
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"unknown OmniVision sensor detected: 0x%04x\n",
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id);
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return 0;
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}
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if (dev->em28xx_sensor == EM28XX_NOSENSOR)
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dev_info(&dev->intf->dev,
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"unsupported sensor detected: %s\n", name);
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else
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dev_info(&dev->intf->dev,
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"sensor %s detected\n", name);
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dev->i2c_client[dev->def_i2c_bus].addr = client.addr;
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return 0;
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}
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return -ENODEV;
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}
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int em28xx_detect_sensor(struct em28xx *dev)
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{
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int ret;
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ret = em28xx_probe_sensor_micron(dev);
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if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0)
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ret = em28xx_probe_sensor_omnivision(dev);
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/*
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* NOTE: the Windows driver also probes i2c addresses
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* 0x22 (Samsung ?) and 0x66 (Kodak ?)
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*/
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if (dev->em28xx_sensor == EM28XX_NOSENSOR && ret < 0) {
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dev_info(&dev->intf->dev,
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"No sensor detected\n");
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return -ENODEV;
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}
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return 0;
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}
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int em28xx_init_camera(struct em28xx *dev)
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{
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char clk_name[V4L2_CLK_NAME_SIZE];
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struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
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struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus];
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struct em28xx_v4l2 *v4l2 = dev->v4l2;
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int ret = 0;
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v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
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i2c_adapter_id(adap), client->addr);
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v4l2->clk = v4l2_clk_register_fixed(clk_name, -EINVAL);
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if (IS_ERR(v4l2->clk))
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return PTR_ERR(v4l2->clk);
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switch (dev->em28xx_sensor) {
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case EM28XX_MT9V011:
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{
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struct mt9v011_platform_data pdata;
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struct i2c_board_info mt9v011_info = {
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.type = "mt9v011",
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.addr = client->addr,
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.platform_data = &pdata,
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};
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v4l2->sensor_xres = 640;
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v4l2->sensor_yres = 480;
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/*
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* FIXME: mt9v011 uses I2S speed as xtal clk - at least with
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* the Silvercrest cam I have here for testing - for higher
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* resolutions, a high clock cause horizontal artifacts, so we
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* need to use a lower xclk frequency.
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* Yet, it would be possible to adjust xclk depending on the
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* desired resolution, since this affects directly the
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* frame rate.
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*/
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dev->board.xclk = EM28XX_XCLK_FREQUENCY_4_3MHZ;
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em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
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v4l2->sensor_xtal = 4300000;
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pdata.xtal = v4l2->sensor_xtal;
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if (NULL ==
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v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
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&mt9v011_info, NULL)) {
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ret = -ENODEV;
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break;
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}
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/* probably means GRGB 16 bit bayer */
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v4l2->vinmode = 0x0d;
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v4l2->vinctl = 0x00;
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break;
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}
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case EM28XX_MT9M001:
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v4l2->sensor_xres = 1280;
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v4l2->sensor_yres = 1024;
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em28xx_initialize_mt9m001(dev);
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/* probably means BGGR 16 bit bayer */
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v4l2->vinmode = 0x0c;
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v4l2->vinctl = 0x00;
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break;
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case EM28XX_MT9M111:
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v4l2->sensor_xres = 640;
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v4l2->sensor_yres = 512;
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dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
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em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
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em28xx_initialize_mt9m111(dev);
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v4l2->vinmode = 0x0a;
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v4l2->vinctl = 0x00;
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break;
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case EM28XX_OV2640:
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{
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struct v4l2_subdev *subdev;
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struct i2c_board_info ov2640_info = {
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.type = "ov2640",
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.flags = I2C_CLIENT_SCCB,
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.addr = client->addr,
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.platform_data = &camlink,
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};
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struct v4l2_subdev_format format = {
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.which = V4L2_SUBDEV_FORMAT_ACTIVE,
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};
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/*
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* FIXME: sensor supports resolutions up to 1600x1200, but
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* resolution setting/switching needs to be modified to
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* - switch sensor output resolution (including further
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* configuration changes)
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* - adjust bridge xclk
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* - disable 16 bit (12 bit) output formats on high resolutions
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*/
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v4l2->sensor_xres = 640;
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v4l2->sensor_yres = 480;
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subdev =
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v4l2_i2c_new_subdev_board(&v4l2->v4l2_dev, adap,
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&ov2640_info, NULL);
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if (NULL == subdev) {
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ret = -ENODEV;
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break;
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}
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format.format.code = MEDIA_BUS_FMT_YUYV8_2X8;
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format.format.width = 640;
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format.format.height = 480;
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v4l2_subdev_call(subdev, pad, set_fmt, NULL, &format);
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/* NOTE: for UXGA=1600x1200 switch to 12MHz */
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dev->board.xclk = EM28XX_XCLK_FREQUENCY_24MHZ;
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em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk);
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v4l2->vinmode = 0x08;
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v4l2->vinctl = 0x00;
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break;
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}
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case EM28XX_NOSENSOR:
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default:
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ret = -EINVAL;
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}
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if (ret < 0) {
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v4l2_clk_unregister_fixed(v4l2->clk);
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v4l2->clk = NULL;
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(em28xx_init_camera);
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